Really? I'm the first one to write 'The cake is a lie!'? Well, it's a dirty job but...

Unique puzzle game about a cake.

not much of a puzzle game guy but this was hard to find fault with

Very well-designed puzzles based on a fantastic concept. Great humorous atmosphere. And such tasty cake!

great game that has been surpassed in basically every way by the sequel

Another classic by valve. Surreal, a bit funny too, very original and fun, a classic.

/completed

I like this, theoretically, but motion sickness ruins it for me. Too many portals and I'm literally nauseous for the rest of the day. >_> The concept is excellent & it's clearly a well made game. Plus the soundtrack...!

It will test you're mind!

Fun gameplay, but I feel the story / dialogue / humor is overhyped.

Twas fun. Nice story.

Seemed like a tutorial for the second game. Sigh

Love it. It takes an original puzzle concept and makes a great gameplay out of it.

Enjoyed the whole game, it is short and sweet and a concept unlike any other game I have played.

Portal is a game of decent and unique mechanics, maybe a little dry, but decent. What elevates it is the story, character, and unparalleled atmosphere. It might now be a horrible meme but the fact that the simple sentence: "the cake is a lie" can be mysterious, funny, and terrifying, all at the same time, is a testament to how well this game is put together.

The sadistic humor of the overseeing computer G.L.A.D.O.S. is really what makes the game, as challenging and innovative as the puzzles were. What you remember is G.L.A.D.O.S. This game has become so quotable. This was a triumph....

Portal is the perfect puzzle game for one single reason. It's actually challenging. Each level makes great use of the physics and mechanics built into the game.

A new concept back in the day and a great one, too!

The humor is a little too zany sometimes, but that's the worst thing I can say about this game.

A great game all around! But could be better.

If there is a downside, it's that this is a short game. But I'll take what I can get, because this is still perhaps my favorite computer game of all time.

An inventive, hilarious, and replayable classic.

Would be better if I could invert the x camera axis but since it's a puzzle game I'll forgive it.

Short but sweet!

Puzzle platforming at it's best. This is the type of game that makes me sad valve has devolved into 3 things: DOTA, CS:GO lootboxes, and running steam.

An absolute innovation upon release. Portal was originally only available as part of the Valve Orange Box compilation, which may have been because they didn't know how to market what was almost an extended tech demo. It's a first person physics based puzzle game with some levels lasting mere seconds. The game itself can be completed in minutes, but most will be challenged for a good few hours. A cult classic, Portal paved the way for a full blown sequel which surpassed all expectations.

I never finished this, it hurt my brain too much. I love the concept and the originality and dark humor, but yeah. Puzzles.

while not quite as interesting as some other puzzle games, its craft is near flawless.

So much damn fun. A great little experience.

a timeless classic.

Portal is nearly a perfect game,In it's concise 2-3 hour length, it features not just great brain-teasing gameplay, but also the most brilliant black humour of any video game, powered by a great voice-acting performance by Ellen McLain. If you havn't played it yet, you absolutely owe it yourself to do so.